Get ready for plenty of ‘Why the hell did she do that?’ moments … Denise Gough and Tom Hughes in Paula.
Photograph: BBC/Sophie Mutevelian

Election 20179pm, BBC1, ITV & Channel 4

The short wait is over as David Dimbleby once again takes the helm for BBC’s coverage of the general election, flanked by Andrew Marr and Kirsty Wark, among others, while Tom Bradby, Nina Hossain and Robert Peston head ITV’s team. Might it be a closer call than originally thought? Meanwhile on Channel 4, Jeremy Paxman, David Mitchell and Richard Osman host a merrier take on the night’s political developments. David Stubbs

Frankie Boyle’s New World Order10.30pm, BBC2

Utilising a format similar to the Election Autopsy he performed in 2015, this Frankie Boyle vehicle is launching, rather piquantly, on election night. Boyle will be using a combination of comedy, discussion and audience feedback to reckon with the multiple bewilderments of the current cultural and political moment. Tonight, he’ll be joined by guests including Sara Pascoe. Expect insight and probably a dollop or two of righteous offence. Phil Harrison

Paula9pm, BBC2

Few people are left unscathed as the finale begins, but there’s no let-up as they nurse their bruises. Mac is suspended from the investigation into Philip’s death, but finding it hard to let go. And it’s no surprise that Paula (Denise Gough) still hasn’t cracked a smile. As well as the rats in the basement and the arrival of a random dog to deal with, Paula is unravelling as her mind plays tricks on her. Get ready for plenty of “Why the hell did she do that?” moments. Hannah Verdier

Kat and Alfie: Redwater8pm, BBC1

This strange pseudo-spinoff (Kat and Alfie hardly do anything) lurches further into horror-thriller territory as wrong ’un Father Dermott careers malevolently around the village. He sizes up potential victims, safe in the knowledge that in dramas like this, honking implausibility will keep the bad guy safe for a while yet. At least he propels us forward; elsewhere it’s all yearning and fuming about events from years ago. Jack Seale

The Immortal Life of Henrietta Lacks9pm, Sky Atlantic

In 1951, Henrietta Lacks had cancerous cells taken from her body without her consent. Able to be replicated indefinitely, these cells had a profound effect on modern medicine even as their donor was airbrushed from history. Based on the 2010 bestseller, this highly charged drama follows the attempts of Deborah Lacks (Oprah Winfrey) to reclaim her mother’s legacy, spurred on by writer Rebecca Skloot (Rose Byrne). Graeme Virtue

DIY SOS: The Big Build8.55pm, BBC1

Head teacher Garry and social-carer Kyle married 10 years ago, and began a heroic journey into foster care, eventually adopting four vulnerable children with serious special needs, Down’s syndrome and cerebral palsy among them. Enter Nick Knowles and his army of tradesfolk to level their dilapidated bungalow on the Isle of Sheppey and build them a brand-new home, the biggest project the series has ever undertaken. Pass the tissues. Ben Arnold

All This Mayhem10pm, Viceland

This feature-length documentary about Aussie sporting greats the Pappas brothers is part-tragic biopic, part-elongated 90s skate vid. The self-described “little bogans” moved to the US as unsupervised teens, took loads of acid and soon became the Venus and Serena of vert skateboarding. Then it all started to go wrong. Tas Pappas makes an entertaining and reflective guide, but Tony Hawk fans should look away now; your boy’s about to get slated. Ellen E Jones

Film choice

Don’t Look Now (Nicolas Roeg, 1973) 2.25am, Horror Channel

Grief, guilt and a very nasty serial killer inhabit chilly out-of-season Venice in Roeg’s masterly supernatural thriller. Based on a Du Maurier story, it has Donald Sutherland and Julie Christie as a couple recuperating in the labyrinthine city after the accidental drowning of their daughter; here they meet a blind medium who foresees danger. Fragmented visual clues – glimpses of red, a funeral procession, breaking glass – meld into an awful sense of impending doom. Paul Howlett

Live Sport

Football: Fifa Under-20 World Cup 8.45am, Eurosport 2. The opening semi-final from Daejon World Cup Stadium in South Korea.